The 10 Unbelievable Vegetable Oil Secrets They Aren’t Telling You

How Much Did You Know About Vegetable Oil?

vegetable oil

Vegetable Oil is oil produced from seeds or other components. Examples of these seeds include; Canola oil, corn oil, cottonseed oil, grapeseed oil, rapeseed oil, soybean oil, and safflower oil. Vegetable oil is used to flavour food, improve texture, and cook it. Almost everyone nowadays cooks food, fries, and bakes with vegetable oil.


The history of vegetable oil

Vegetable oil has gone through a transition of so many trials and products. Let’s first get a good understanding of how these oils came to be.

Before the 1890s, western society only cooked with animal fats. Examples of these fats included Tallow, lard, and butter.  Eastern nations, on the other hand, relied on cold-pressed fats such as coconut and palm oil.

When the Industrial Revolution kicked in, it saw an increase in machinery that required oil to operate. Initially, whale oil was utilized for this purpose.

As the whale population declined, the demand for a new alternative arose. They found Cottonseed oil at that time. That was a better option at the time because cotton output was high, and the seeds were no longer helpful.

vegetable oil

However, when fossil oil was discovered, there was no longer a need for cottonseed oil.


Procter & Gamble, the first recognized soap-making company, used the newly created hydrogenation technique to generate oil from seeds. Initially, they utilized coconut and palm oil to make these soaps, but when the opportunity arose, they switched to cotton seeds. While doing that, they saw that soap resembled lard and realized that they could market it as a substitute. That was the beginning of “Crisco,” the first vegetable oil, which was less expensive and more accessible than the previously utilized animal fat. Later on, Procter and Gamble switched to Soybean which was much cheaper than cottonseed.

vegetable oil
crisco oil

In 1924, the American Heart Association was founded, even though heart disease was still uncommon at the time. Procter & Gamble later donated $1.5 million in 1948 to the American Heart Association to promote Crisco as a healthful alternative to animal fats. However, when President Eisen Hower died from a heart attack in 1955, the public associated saturated fats with heart failure, contributing to a greater understanding of the developing cardiovascular illness linked to saturated fats.

The American Heart Association issued the first formal guideline in 1961 to reduce total fat, saturated fats, and cholesterol intake while increasing polyunsaturated fat intake. The United States published the advice in the Dietary Guidelines in 1977. That is when these highly processed oils began to be advertised as healthy foods, and their use continued to rise.

When Phil Sokolof, an American multi-millionaire, suffered a heart attack and wished to safeguard others from cardiovascular ailments, he launched a crusade against saturated fats.


He even went above and beyond in his charitable efforts to eradicate saturated fats from American diets. He began by contacting food giants, but when they did not react, he launched a campaign of smears against them.

He is recognized for single-handedly convincing McDonald’s to transition from tallow to polyunsaturated fats. Before his heart failure, he urged several corporations to switch from saturated to polyunsaturated fats. That was how the vegetable oils we use every day were invented.

The Process of Getting Oil Out of a Seed

Oil extraction and processing techniques provide high-quality oil with low unwanted components, high extraction yields, and high-value meals. There are several methods for extracting oil from seed, but solvent extraction with hexane is the standard in today’s sophisticated oilseed processing plants.

  • The seeds are first collected in huge quantities.
vegetable oil
  • After that, cleaning and grinding are required because the seeds may include residue.
  • Before the process continues, incoming oilseeds are processed by magnets to eliminate any trace metal.
  • After that, they are heated to extremely high temperatures, causing oxidation.
  • They are subsequently treated in a solvent such as hexane, a crude oil-derived chemical. It has a foul odor as a result of this.


  • After that, they deodorize the oil to remove the rancid stench.
  • More chemicals are added to give the oil a clearer color because the procedure produces a greyish liquid.
vegetable oil
grey liquid
  • After that, they are now packaged ready to be sold.
Vegetable oil
packaged vegetable oil in a stall

Dangers of using fats that have undergone this process

  1. They are harmful because they do not contain trans fat. They are highly unstable in oil form, which means they oxidize quickly and become rancid, which is detrimental to the human body. That is why we take antioxidants: oxidation produces inflammation in the body, such as wrinkles and internal heart problems.
  2. Oil oxidizes and breaks down into oxidation products when heated and left out in the open. When heated, just like any other chemical, the reaction speeds up and produces many degraded oxidation products, some of which are toxic.
  3. The unstable plaque that causes heart obstruction is considered to be caused by oxidized LDL.
  4. They are produced with GMO grains -Many vegetable oils, including corn, canola, and soybeans, are manufactured with genetically modified organisms (GMOs). These are generally sprayed with pesticides and genetically modified, rendering them unfit for human consumption.
  5. They contain chemicals and are highly processed– Vegetable oils are not obtained via natural pressing but rather through chemicals. The grains are mixed with a chemical called hexane to extract the most oil. The oil is then heated to remove the solid wax, which causes the oil to oxidize. After that, the oil is deodorized and adjusted. The oil is then chilled, bleached, and degummed with other chemicals to remove more contaminants. It is then deodorized chemically.


What Are Fats?

Fats are energy-producing nutrients. There are three types of fats, and both are present in most diets. However, one kind of fat is frequently more prevalent than the other.

Types of Fats

  1. Saturated fats
  2. Unsaturated fats
  3. Trans-fats

Saturated fats

These are the kinds of fats found in animal products. However, a few plant foods contain them, such as coconut, coconut oil, and palm oil. They are not detrimental to your health as they do not have any double bond.

Saturated fats are good for your overall health, although there has been an ongoing misconception about them being harmful to you, which started in the 1950s.

Unsaturated Fats

Unsaturated fats are primarily found in plant-based foods, including vegetable oils, nuts, and seeds.

They are divided into two;

1. Monounsaturated Fats

Monounsaturated fats are fat molecules with one unsaturated carbon bond, often known as a double bond. Monounsaturated fat-containing oils usually are liquid at room temperature but solidify when cooled—also referred to as Oleic acid, Omega 9 fats, or Olive oil.

Monounsaturated fats have high Olive, peanut, and canola oils, avocados, nuts including almonds, hazelnuts, pecans, and seeds like pumpkin and sesame seeds.

2. Polyunsaturated Fats

Polyunsaturated fats are fat molecules with more than one unsaturated carbon bond. Polyunsaturated fats are classified into two categories;

  1. Omega 6 fats- They are found in vegetable and seed oil like sunflower, corn, soybean, flaxseed oils, Walnuts, and Flaxseeds
  2. Omega 3 fats – They are found in fish oil.

It is not enough to supplement the diet with fish oil to boost the amount of omega 6 in the body. You must also minimize the amount of omega 6 in your diet, which is why we must limit our intake of vegetable and seed oils. The imbalance of omega 6 and omega 3 in your diet makes it detrimental to your health. That is why there is a need to balance Omega 6 and 3. If not, there will be health risk factors.



Transfat is a type of fat that has undergone a hydrogenation procedure. That procedure extends the shelf life of fat while also making it tougher at room temperature.

Why Does Cooking Oil Matter?

Cooking oil is significant because of the impact it has on our overall health. I know some people might be wondering why vegetable oil raises so many concerns.

The nutritional composition of oils derived from various sources can differ significantly, including the number and types of fatty acids present. That has the potential to have a significant impact on the more challenging implications. Cooking oils ultimately reach their smoke point when heated, especially at high temperatures.

That is the point at which the oil loses its stability and begins to degrade. When this happens, it oxidizes and generates free radicals, which induce oxidative stress when eaten. Oxidation is harmful to one’s health since it can cause cellular damage, leading to disease development.

Aside from that, the amount of processing that a cooking oil has gone through can impact its quality. As a result, vegetable oil is harmful to your general health because it is highly refined, chemically treated, highly unstable, and undergoes so many stages before being consumed.


Short-term effects of vegetable oil

1. Vegetable oil Lowers Testosterone Levels in Men

Testosterone is a sex hormone that has a significant impact on one’s health. It is critical to keep testosterone levels in check to grow muscle mass, improve sexual function, or increase strength. According to several studies, eating soy products can lower testosterone levels. Therefore, avoiding soy oil and products, in general, helps in keeping your testosterone in check.

Vegetable oil, on the other hand, is associated with lowering testosterone levels. In the study, Saturated, monounsaturated, and polyunsaturated fat intake were all inversely associated with total testosterone levels in the blood. However, unlike monosaturated fats and saturated fats, decreased testosterone was seen in polyunsaturated fats.


2. May cause Asthma

Processed industrial vegetable oils, such as maize oil, soybean oil, safflower oil, sunflower oil, and cottonseed oil, are high in pro-inflammatory omega-6 fatty acids and should be avoided by people living with asthma.

People who eat olive oil have the lowest asthma rates, while those who consume soybean, corn, and canola oil have the highest asthma rates. According to A study carried out in 2014 conducted by Northwestern University’s School of Medicine, the widespread substitution of butter with soybean, corn, and canola oils in the US population may reduce lung function in as many as 4.5 million people.

3. Causes Inflammation

Soy, corn, sunflower, safflower, and palm oils are high in the inflammatory omega-6 fatty acid and low in anti-inflammatory omega-3 fatty acid. That happens due to the imbalance between omega 6 fats and omega 3 fats.

4. Leads to Macular Degeneration

Industrial seed oils may harm the eyes. High consumption of omega-6 fatty acids raises the risk of age-related macular degeneration, a visual loss illness that eventually leads to blindness. Omega-6 fatty acid imbalances may cause eye difficulties by causing inflammation and displacing the omega-3 fatty acid DHA, which is essential for vision.

Long-term effects of Vegetable Oil

1. Causes weight gain

Cooking oils are a necessary element while preparing your favorite cuisine, but the reality is that certain types of oils may cause you to gain weight. For example, soybean oil, a standard vegetable oil consumed at an alarming and hazardous rate, is a nutritional disaster linked to massive weight gain in animals.

Vegetable oils destroy cells and surrounding bodily tissue, causing inflammation and oxidation, which lead to weight gain and make it difficult to maintain health.

In 2015, University of California researchers made this discovery after dividing mice into four groups and feeding each meal containing 40% fat and calories.

Two groups were given a diet high in coconut oil, a popular source of saturated fat, and fructose sugar.

The other mice were fed a diet high in soybean oil, similar to what a typical American eats, and one of the two soybean groups was given fructose.

The researchers discovered that mice on the soybean oil diet acquired 25% more weight than animals on the coconut oil diet and 13% more than groups given fructose.

Researchers speculated that soybean oil was detrimental because of its high omega-6 fatty acid content, particularly linoleic acid, which accounts for about 55 percent of soybean oil.


2. It affects Neurological conditions like autism and Alzheimer’s disease

A study was conducted in 2020 by the UC Riverside research on soybean oil, which is America’s most extensively consumed cooking oil. The oil has been discovered to cause genetic alterations in the brain.

Cutting on these oils may help in reducing the risk of Alzheimer’s disease. According to the UC riverside researchers, the effects of modified and unmodified soybean oil on the brain were not different. According to the researchers, the oil had a noticeable impact on the hypothalamus, where several essential processes occur. The researchers discovered that some genes in mice fed soybean oil were malfunctioning. The “love” hormone, oxytocin, is produced by one of these genes.

Oxytocin levels in the hypothalamus of soybean oil-fed mice decreased. Around 100 additional genes were revealed to be influenced by the soybean oil diet by the research team. This discovery, they believe, could have implications not only for energy metabolism but also for appropriate brain function and disorders like Alzheimer’s disease.

3. It causes Anxiety and Depression

According to a new study undertaken by a group of Turkish experts, different forms of fat and oil consumption have distinct effects on people’s learning capacity, anxiety levels, and depression risk. Experiments were conducted on mice fed 10% enhanced fats and oils obtained through standard means, such as sunflower oil, natural olive oil, margarine, and butter.

They used a “direction finding module” to assess experimental animals’ memory and learning abilities, while a water tank was used to assess the animals’ depression risk by evaluating their survival motivations.

Professor Nazan Uysal Harzadn of Dokuz EylĂĽl University’s Medical Faculty said that the subjects fed margarine and sunflower oil experienced equal anxiety levels because both components harmed the animals’ decision-making abilities caused despair. Margarine, like sunflower oil, had a deleterious impact on the animals’ decision-making abilities, and depressive symptoms were at their height in mice fed margarine.


The animals were placed in a jar to stay on top to survive the experiment, but they were motionless.

According to the professor, the subjects fed with natural olive oil had one of the most beneficial effects of all the oil and fats, with deficient levels of despair and anxiety and good learning capacities. The best effects were shown in mice given butter via the traditional approach since they had the lowest levels of anxiety and no signs of sadness, and their learning levels were extremely high.

4. Dementia

Dementia is a word used to describe a loss of memory, language, problem-solving, and other thinking abilities that is severe enough to affect daily life. Alzheimer’s disease is the most prevalent cause of progressive dementia in older people. Still, dementia can also be caused by various other conditions, such as seed and vegetable oil.

According to scientists, the oil can cause plaque to form in the brain, a recognized precursor to catastrophic neurodegenerative illnesses. A nutritionist and family physician Dr. Catherine Shanahan explained the connection between Alzheimer’s disease, dementia, and vegetable oil. She explained that Vegetable oil promotes oxidative stress, which destroys brain membranes and causes plaque to build upon the brain.

Minor, moderate, and severe effects of Vegetable Oil

Minor effects of Vegetable Oil

  1. It causes migraines.
  2. It makes you feel fatigued.
  3. It may trigger Irritable Bowel Syndrome.

Moderate effects of Vegetable Oil

1. It causes Rheumatoid arthritis.

Omega-6 fatty acids have been linked to the prevalence of synovitis, an inflammation of the membrane that lines joint cavities that can progress to arthritis.

In contrast, MRI findings show an inverse connection between omega-3 fatty acid consumption and cartilage loss in the knee.

2. It Leads to Metabolic syndrome.

Vegetable oil is also said to cause metabolic syndrome. A study was carried out in India, and there was evidence of that. The use of vegetable oils induces changes in metabolic and inflammatory parameters. Consumption of HVOs and butter was positively related to an increased risk of MetS, according to a study conducted by diabetes research and clinical practice.

3. Causes Autoimmune diseases

Ongoing research suggests that pro-inflammatory vegetable oil may exacerbate autoimmune illness by increasing free radical generation and decreasing antioxidant enzyme mRNA levels, lowering immune function and, in particular, anti-inflammatory cytokine production.


Severe effects of Vegetable Oil

1. Death

Consumption of cooking oil/fat can result in death from cardiometabolic illnesses in severe cases. In 2013, a study was carried out, and the participants in the study were divided into two groups by the researchers.

Both groups consumed the same amount of fat and oil. However, the first’s fat came predominantly from vegetable oil sources such as safflower oil and margarine, whereas the second’s fat came from olive oil and butter sources.

For the next seven years, both groups were observed and analyzed regularly. During the seven-year trial, those who consumed more vegetable oil had a 62 percent greater death rate than those who consumed less.

In the study, Linoleic acid replaced saturated fats with dietary, raising death rates from all causes, including coronary heart disease and cardiovascular disease.

Another study(The Margarin study) was conducted. In this experiment, people were divided into groups and told to eat different types of margarine. One group consumed margarine made with more fat from vegetable oil, and the second group margarine made with less fat from vegetable oil.

After two years, the group eating the margarine with the most vegetable oil had seven times the number of strokes, heart attacks, and cardiovascular deaths as the group eating the margarine with the least vegetable oil.

2. Heart disease

Anything that has been exposed to so many chemicals can not possibly be good for the body. Omega 3 and 6 deficiency causes heart problems and autoimmune illnesses. The omega-6 fatty acid contained in vegetable oils is linked to coronary artery disease.

According to research, linoleic acid in adipose tissue and platelets is also linked to coronary artery disease.

3. Cancer

There is a link between vegetable oil and cancer, one of the severe effects of vegetable and seed oil. According to studies, there appeared to be a link with several major chronic conditions, including heart disease, irritable bowel syndrome, and arthritis. And then there is cancer. Vegetable oil may lead to different types of cancer. Such as breast, prostate, and colon cancers.


Scientists discovered that heating vegetable oils released large amounts of aldehydes, which have been related to diseases such as cancer, heart disease, and dementia. According to Martin Grootveld, a professor of bioanalytical chemistry and chemical pathology, “a typical supper of fish and chips” fried in vegetable oil had 100 to 200 times more harmful aldehydes than the World Health Organization’s acceptable daily limit.

Sunflower oil, vegetable oil, corn oil, cold-pressed rapeseed oil, olive oil, butter, goose fat, and lard were distributed to volunteers and requested to utilize them in everyday cooking. They gathered any remaining oil and sent it to DMU’s labs for testing. When fats and oils are cooked, their molecular structure changes, releasing compounds known as aldehydes,  linked to heart disease and cancer.

In studies, however, heating butter, olive oil, and lard yielded significantly lower quantities of aldehydes. The most insufficient amounts of hazardous compounds were found in coconut oil.

Science shows that these oils are carcinogenic. Continuous heating of these oils may produce Carcinogens that are hazardous to the human body hence causing cancer.

Is vegetable oil found in everything currently?

Vegetable oil is now used in a wide range of products, including food and home items. Polyunsaturated oils are found in processed foods such as salad dressings, margarine, mayonnaise, and cookies and their use in cooking and baking. 

Currently, you can find one or more of these low-quality polyunsaturated oils can in practically every processed food item. That can be seen on food labels in supermarkets, as well as in restaurants and hotels. All of their cooking is done using these oils.

Are polyunsaturated fats bad for your health?

The fundamental issue is an imbalance in the amount of omega 3 and omega 6 fats in the modern diet. Omega 3 fats are digested in the same way as omega 6 fats. However, they do not cause inflammation. Eicosanoids are produced when the body is out of equilibrium, which travels and induces inflammation or immune system fever.

You will be in an inflammatory state if there is more omega 6 in your cell membrane than omega 3. That is why it is essential to balance omega 3 and omega 6 in your diet.

Are saturated fats unhealthy?

Whether or not saturated fats are unhealthy is a very controversial ongoing debate. That has sparked a debate about what was correct and what was incorrect.

This thread began with pure speculation in the 1950s. Still, the claim that excessive cholesterol is linked to heart disease and that saturated fats are one of the basic materials used to manufacture cholesterol was too appealing to dismiss a theory.


Minnesota Coronary Experiment’s research looked into whether substituting vegetable oil for saturated fats could help avoid heart disease. The findings were startling because people who moved from saturated fats to vegetable oils died more from heart disease, and those who had their cholesterol levels decreased the greatest died the most

How you can avoid vegetable oil

  1. Do not buy vegetable oil or spays at all. Instead, use natural cooking fats like butter, ghee, tallow, lard, coconut oil, or olive oil for cooking and dressings to avoid health problems like brain health.
  2. When purchasing liquid oils like olive oil or avocado oil, search for versions offered in dark glass bottles because light can cause oils to go rancid and keep them in a cool, dry location away from heat sources
  3. Avoid processed foods altogether.
  4. Look on the labels of the food you buy in stores and supermarkets to read the ingredients used to make them.
  5. Avoid eating in restaurants as they prepare most of their meals with these vegetable oils.


Better Vegetable Oil Alternatives to consider

1. The extra virgin olive oil

vegetable oil
olive oil

Virgin oil is obtained by crushing and pressing the seeds to extract the oil. As a result, olive oil is one of the better cooking options.

The oil that has not been refined is healthier than oil that has been refined. That is because olive oil is cold-pressed, which means it is not exposed to high heat or chemicals during processing, preserving the natural nutrients and flavor.

Monounsaturated lipids are abundant in extra virgin olive oil, which is deficient in polyunsaturated fats. You should always purchase extra virgin olive oils packaged in dark packaging because even light can cause them to oxidize.

2. Avocado oil

vegetable oil
avocado oil

Avocado oil is a fantastic replacement for other vegetable oils. It is unprocessed, exactly like extra virgin olive oil, but it has a greater smoking point, allowing it to be used at higher temperatures and making it ideal for stir-fries. It does not have a lot of flavors. Thus it is a suitable choice for cooking. Avocado oil also has so many functions to our overall health.

3. Coconut oil

vegetable oil
coconut oil

Coconut oil is a superfood with numerous health benefits. It contains medium-chain triglycerides such as lauric acid, a fatty acid with antifungal, antibacterial, and antiviral effects that are quickly utilized by the body for energy. Because coconut oil is 90% saturated fat, it is extremely heat stable.

4. Animal fats like Lard and Tallow

Lard and Tallow are other better options for you and the good of your overall health. Tallow is rendered fat from non-pork meats such as beef and bison. It has a high smoke point, making it ideal for cooking at high temperatures. On the other hand, Lard is a high-saturated-fat derived from pigs that can be used in place of butter in recipes if you can not eat dairy.

5. Ghee


Ghee is another cooking oil that I would recommend. It is created from cow’s milk butter that has been cooked at a low temperature until the water has evaporated, leaving only the milk solids. If necessary, the solids are then skimmed or filtered and a clarified liquid fat is all that is left(Ghee). It is high in vitamins, antioxidants, and heart-healthy fats. Ghee is the superior option for persons who have allergies or sensitivities to certain dairy ingredients.


This article has covered everything you need to know about vegetable oil. From its origins to the methods used to extract it, the impacts are numerous. We have also learned from many investigations and research that the topic of vegetable oil is a contentious one. The reasons for avoiding vegetable oil have also been discussed in the article.

Make your health a priority by living healthily for a healthy person is a happy person. Feel free to tell us in the comment section what you know about vegetable oil and is missing in the article.

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